[feature]: Add a confirmation prompt before executing project deletion to prevent accidental destructive operations.

## Problem
Currently, deleting projects using the Harbor CLI does not require confirmation.
This can lead to accidental deletion of projects, which is irreversible and may result in unintended data loss.

## Proposed Solution
Add a confirmation prompt before executing project deletion.

- Prompt user before deletion
- Display project name(s) or project ID in the prompt
- Abort operation if user declines
- Skip confirmation when `--force` flag is used

## Example Workflow

## Alternatives Considered
Users can manually double-check commands before execution, but this is error-prone and not reliable for destructive operations.

## Additional Context
Many CLI tools (e.g., kubectl, docker) include confirmation or safeguards for destructive actions.
This feature improves user safety and aligns Harbor CLI with common CLI UX practices.